His influence was not confined to Florence, or even to Tuscany, but the whole of Italy was indebted to him for a new impulse in art, and he is said to have followed Pope Clement V. to Avignon and executed many pictures there. Giotto was not only a painter, but his name is also famous in the history of architecture: the wonderful Campanile adjoining the Duomo in Florence was designed by him, and the foundations laid and the building erected under his instructions. On sculpture too he exercised a considerable influence, as may be seen in the panels and statues which adorn the lower part of the tower, suggested if not actually designed by Giotto, and carved by Andrea Pisano. Chief of the earlier works of Giotto are his frescoes in the under church at Assisi, and in these may be seen the remarkable fertility of invention with which he endowed his successors. Instead of the conventional Madonna and Child, and groups of saints and angels, we have here whole legends represented in a series of pictures of almost dramatic character. In the four triangular compartments of the groined vaulting are the three vows of the Franciscan Order, namely, Poverty, Chastity, and Obedience, and in the fourth the glorification of the saint. In the first, the Vow of Poverty, it is significant to find that he has taken his subject from Dante. Poverty appears as a woman whom Christ gives in marriage to S. Francis: she stands among thorns; in the foreground are two youths mocking her, and on either side a group of angels as witnesses of the holy union. On the left is a youth, attended by an angel, giving his cloak to a poor man; on the right are the rich and great, who are invited by an angel to approach, but turn scornfully away. The other designs appear to be Giotto's own invention. Chastity, as a young woman, sits in a fortress surrounded by walls, and angels pay her devotion. On one side are laymen and churchmen led forward by S. Francis, and on the other Penance, habited as a hermit, driving away earthly love and impurity. S. Francis in glory is more conventional, as might be expected from the nature of the subject. In the ancient Basilica of S. Peter in Rome Giotto made the celebrated mosaic of the _Navicella_, which is now in the vestibule of S. Peter's. It represents a ship, in which are the disciples, on a stormy sea. According to the early Christian symbolisation the ship denoted the Church. In the foreground on the right the Saviour, walking on the waves, rescues Peter. Opposite sits a fisherman in tranquil expectation, typifying the confident hope of the simple believer. This mosaic has frequently been moved, and has undergone so much restoration that only the composition can be attributed to Giotto.